Furnace-casing ring



Aug. 14, 1923.

Q. M. BULLER FURNACE CASING RING Filed Dec. 12, 1921 Patented Aug. 14, 1923.

CHARLES M; BULLER, or MILWAUKEE, WISCONSIN, .assrelvon TO L. J. MUELLER FURNACE COMPANY, or MI AUKE WISCONSIN, A CORPORATION or WISCONSIN.

FURNACE-CASING RING.

Applicationfiled December 12, 1921. Serial No. 521,729.

useful Improvements in Furnace-Casing Rings, of which the following is a description, reference being had to. the accompany ingdrawings, whichare a part ofthis specification. b v

. This invention relatesto, improvements in furnace casing ring. i V

ltvis one of the objects. of the present invention to provide a furnace casing ring more particularly adapted for connecting outer furnace casings and for supporting inner furnace casings.

A further object of the invention is to providea furnace casing ring which may be formed from an integral piece of metal shaped to connect outer furnace casings together and to support and hold inner furnace casings in spaced relation to the outer casings.

A further object of the invention is to provide a furnace casing ring of the reversible type to permit its use in holding the upper or the lower edge of an inner furnace casing.

A further object of the invention is to provide a furnace casing ring having inwardly extending inner casing supporting and holding arms which are formed integral with the ring and without requiring any greater amount of metal than is required for the ring alone. i

A further object of the invention is to provide a furnace casing ring which is of simple construction, is strong and durable and is well adapted for the purpose described.

With the above and other objects in view the invention consists of the improved furnace casing ring and its parts and combinations as set forth inthe claims, and all equivalents thereof.

In the accompanying drawing in which the same reference characters indicate the same parts in all of the views:

Fig. 1 is'a horizontal sectional view of a furnace casing provided with the improved casing ring, a portionfof -the ring being shown in section;

Fig. 2 is a-detail outer sideview on a larger scale ofa portion of the casingring and portions of furnace casings connected thereto; and

- Fig. 3 is a transverse sectional view thereof taken on line 3-3 of Fig. 2.

Referring to the drawing, the numeral 5 indicates an outer lower casing section, 6 the outer upper casing section and 7 the inner casing section of a hot air furnace. The improved casing ring 8 ispreferably constructed of a'strip of sheet metal bent into annular shape and having its end portions overlapped or abutting and spot welded together as indicated at 9. The ring is formed with inwardly curved upper and lower circumferential edge flanges 10 and a medial outwardly extending circumferential rib 11. The inwardly turned flanges permit the easy insertion of the ring into the ends of the casing sections while the medial rib serves as a shoulder to support the ring in the lower casing section and to support the upper casing section thereon. Said flanges and rib also serve as a means for reinforcing the ring.

Between the rib and one of the flanges 10, arms 12 are partly cut from the metal of the ring and bent radially inwardly in spaced relation to each other to form supporting and holding means for the inner casing 7 The inner end portions of the arms 12 at their points of junction with the body of the ring are bent at oblique angles with relation to a vertical line as indicated by the numeral 12 and more clearly shown in Fig. 2 to position the arm at an angle extending towards a horizontal plane coincident with the medial rib of the ring and to reinforce the arm circumferentially.

The outer end portions of the arms are provided with vertically extending notches or recesses 13 to receive the lower or upper edge portions of the inner casing 7 When the casing ring is positioned adjacent the lower edge of the inner casing 7 the ring arms will engage the lower edge of said casing as shown, but when the ring is used near the upper portion of the furnace it is turned upside down so that the notches of the arms will extend downwardly and the upper edge of the inner casing 7 will enter said notches and be held in spaced position from the outer casing by said arms 12.

From the foregoing description it will be seen that the casing ring is of very simple construction and is Well adapted for the purpose described.

WVhat'I claim as my invention is:

1. A heater casing ring, consisting of a member in the form of a ring adapted to extend into an outer heating casing and having portions of the ring extending in Wardly in a vertical plane to form inner casing supporting arms.

2. A heater casing ring, consisting of a member in the form of a ring adapted to extend into one end portion of a heater outer casing and having a shoulder for supporting said ring in said casing, portions of said ring extending inwardly in a vertical plane to form arms for holding a heater innercasing in spaced relation to the outer casing.

l 3. A furnace casing ring, consisting of a strip of metal in the form of a ring adapted to fit in the end portion of a furnace outer casing and having a shoulder thereon for supporting said ring in said casing, portions of saidring extending inwardly in a vertical plane to form arms for holdingan inner casing in spaced relation to the outer casing.

supporting the ring in the lower casing section and supporting the upper casing section on said rib, portions of said ring extending inwardly in a vertical plane to form arms and each arm having a notch for engaging the edge portion of an inner casing to hold said casing in spaced rela tion to the outer casing."

5. A furnace casing ring, consisting of a single strip of metal in the form of a ring adapted to fit into the adjacent ends of two outer casing sections to connect said sections together and having a medial outwardly-and circumferentially extending rib for supporting the ring in the lower casing section and supporting the upper casing section on said rib, portions of said ring extending inwardly in a vertical plane to form arms and each arm having a vertical notch for receiving one end edge portion of. an inner casing to hold the same in spaced relation from the outer casing sections.

6. A furnace casing ring, consisting of an integral strip of metal in the form of a ring having inwardl turned edge flanges and a medial out-War 1y projecting circumferentially extending stop rib, portions of the metal of the ring extending radially in- Wardly and at an angle vertically and each having a notched edge portion.

In testimony whereof I affix my signature.

CHARLES M. BULLER. 

